Góc học tập
18/06/2020 09:39:33 PM

Cách làm việc với text file trong ngôn ngữ lập trình Java

import java.util.*;

import java.io.*;

 

class fileProcess {

            int id;

            String name;

 

            void input() throws IOException {

                        Scanner objSc = new Scanner(System.in);

                        File f1 = new File("D:\\test.txt");

                        FileWriter fw = new FileWriter(f1);

                        try {

                                    for (int i = 0; i < 3; i++) {

                                                System.out.print("id");

                                                this.id = objSc.nextInt();

                                                objSc.nextLine();

                                                System.out.print("name");

                                                this.name = objSc.nextLine();

 

                                                fw.write(id + " " + this.name + "\n");

                                    }

                        } catch (FileNotFoundException e) {

                                    e.printStackTrace();

                        }

                        fw.close();

            }

 

            void output() throws IOException {

                        File f2 = new File("D:\\test.txt");

                        FileReader fr = new FileReader(f2);

                        BufferedReader br = new BufferedReader(fr);

                        String str;

                        try {

                                    while((str=br.readLine()) !=null) {

                                                System.out.println(str);

                                    }

                                   

                        }catch(FileNotFoundException e) {

                                    e.printStackTrace();

                        }

                        br.close();

            }

}

 

public class demo {

 

            public static void main(String[] args) throws IOException {

                        fileProcess f = new fileProcess();

                        f.input();

                        System.out.println("Danh sach sinh vien tu file");

                        f.output();

            }

}

Trương Đình Huy

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